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Simple FM stereo radio with a TEA5767 breakout module and an Arduino

To be a little entertained when tinkering, we build ustoday a small FM stereo radio using a slightly older, but extremely inexpensive, TEA5767 breakout board. However, by this time it will be a little more complicated because we need to solder and have to build some adapters.

FM stereo radio TEA5767 module and an Arduino

First, we build ourselves an adapter for the TEA5767. We take a matrix board, which we cut like in the following picture:

Then we edit two 5 pin headers where we push in the pins so far that they project about 1mm above and tin these with solder:

Now we put the headers on the finished prototype PCB and solder them firmly:

Then we take a little jumper wire, remove the insulation and cut us 10 about 1cm long pieces. (Alternatively you can take the legs, for example, from resistors, LEDs, etc..)

Now we tin the wires and solder the wires to the breakout module:

Once this is done we put the board on our prepared hole matrix adapter (best put on a breadboard) and solder everything. We must proceed relatively quickly, however, as otherwise may the wiresget off from the FM module. (You may resolder again.) Still cutting off the protruding wires and now have our TEA5767 breadboard adapter module ready:

As the radio module has a line-out output, we preparea breadboard cable adapter. This can of course also be a RCA or a stereao-jack. This is another header (3-pin) soldered with an audio cable of your choice. In general, is white the left channel, red the right channel and the compound is black.

Now the TEA5767, the display, the Arduino and power supply are wired according to the following table:

The mono / stereo display is automatic, but is unfortunately on “mute” always shown as mono. Bottom left, there are two modes, “S” is “sound on” and “M” is “mute”. Bottom right is the signal strength as a number (0-15), this is still graphically displayed on the top right corner. In the middle of the screen, of course, is the actual frequency.